Claustrophobia within a family. On a rural estate live three brothers, a sister, and their blind, religious mother. Three of the siblings have epilepsy, the fourth and eldest, Augusto does not, and he's about to break away from the family: he's in love with Lucia and planning to move to the city. Augusto's sister Guilia clumsily tries to frustrate the lovers, while another brother, Alessandro, hatches a far-reaching plot to free himself of his mother's demands and other family responsibilities, to give Augusto the wherewithal to leave with Lucia, and, perhaps, to pursue incestuous impulses with his sister. Does anything stand in his way?